Periscope, Telemeter and Perimeter
Periscope
A Periscope is a scientific instrument for observation from a concealed position.
Telemeter
A Telemeter is a scientific instrument for measuring distance from observer.
Perimeter
A perimeter is the length of boundaries or outer lines of an object. For example,
The perimeter of this rectangle is:
Perimeter = 4 + 4 + 2 + 2 = 12 inches
DIFFERENCE BETWEEN
— Microscope and Telescope
— Element and Molecule